Elastic coupling for motor-gearing.



I. KOECHLIN.

ELASTIC COUPLING FOR MOTOR GEARING. APPLIUATION FILED DEC. 29, 1911.

1,072,622, Patented Sept. 9, 1913.

WWW 9W tinrrnn sra'rns ra'rnnr orrron ISAAC KOECHLIN, OF LEVALLOIS-PERRET, FRANCE, ASSIGNOR TO SOCIE'IE ANONYME DES AUTOMOBILES ET CYCLES PEUGEOT, 0F PARIS, FRANCE.

ELASTIC COUPLING FOR MOTOR-GEARINGr Specification of Letters Patent.

Application filed Deceinber29, 1911. Serial No. 668,426.

proved elastic coupling for motor gearing of the kind comprising an elastic member between the crank and the cam shaft or shafts of an explosion motor.

According to the invention the elastic member consists of a spring in the'form of a cylindrical. split ring which surrounds the crank shaft or the cam shaft, the ring being provided with two lugs extending laterally and circumferentially on each side of the ring and which engage in recesses of the hub of the pinion the slit in the ring being formed obl1quely and extendlng from the edge of one lug to the opposite edge of the other lug.

In the annexed drawing given by way of example, Figure l is a section passing through the axis of the crank shaft and the axis of one of the cam shafts and shows a method of carrying the invention into effect. Fig. 2 is an outer view of an elastic member employed in the arrangement of Fig. 1. Fig. 3 is a sideview of Fig. 2. Fig. l is a section similar to Fig. 1 showing another method of carrying the invention into effect.

As can be seen from Fig. 1 the pinion g) freely mounted on the crank cl, drives the wheel 9 keyed on the cam shaft 7. A driving sleeve m which may be, if necessary,

constituted by hub of the driving pulley of the fan, is keyed on the crank shaft. The hub of the pinion p and the sleeve on are each provided with a recess. Between these two parts an elastic member s is interposed mounted on the crank shaft. This member is constituted by a cylindrical ring provided with two tenons or lugs a b and is split between these tenons. The two tenons a and b engage, the first in the recess of the sleeve m and the second in the recess ofthe pinion p in such a way that the rotation of the sleeve m keyed on the crank shaft is transmitted elastically by the member s to the pinion p. The slit formed .in this member gives it in effect the desired elasticity so that shocks, vibrations, torsions and irregularities of movement are absorbed in such a way that the movement of rotation of the pinion is continuous and changes of direction of thrust in the toothed gear are .prevented.

As shown in Fi g. equally well be mountedon the cam shaft f. In this case the pinion ptis keyed on the crank d and the wheel r is freely mounted on the cam shaft.v

Having now described my invention what I claim asnew and deslre to secure by Letters Patent is:

1. An elastic coupling of the kind described comprising in combination a cylindrical spllt rmg provided with lugs" arranged opposite one another and extending laterally and circumferentially of the ring, a shaft, a driving pinion loosely mounted thereon and provided with arecess in which engages one of the lugs of the split ring,

and a sleeve keyed on the shaft and provided with a recess in which engages the other lug of the split ring, substantially as described and for the purpose set forth.

2. An elastic coupling for motor gearing comprising in combination a cylindrical split ring provided with lugs arranged opposite one another and extending laterally, and circumferentially of the ring, theslit in said ring being formed obliquely and extending from the edge of one lug to the opposite edge of the other lug, a shaft, a pinion loosely mounted thereon and provided with a recess in which engages one of the lugs of the split ring, and a sleeve keyed on the shaft and provided with a recess in which engages the other lug of the split ring, sub stantially as described and for the purpose set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ISAAC KOECHLIN.

Witnesses: V

Louis YosT, BARTLEY F. 'Yos'r. 7

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington; D. 0. i

. Patented Sept. 9, 1913.

e the elastic member can 

